You can use to it place advertations, or draw attention to a hot article on your own website. Here I'll explain how to create such an effect on your website. It uses Flash and JavaScript, and is really easy to install. A live demo for the peeling effect can seen when you fully read this article.
Aqua Style Button with Photoshop. 3.

Now you will have something like a rectangle, but one end is a half circle. Now make a selection of the half circle and some of the rectangle, like this: In the Gradient box, Select the Foreground to Transparent (Second Option). Note that the box may not be black, but select it anyways.